Temporal accumulation of first reports of tree EIDs since 2000 for four geographic regions and 24 tree genera. Models were fitted as y ~ a × exp(b × x) + c, where y is the cumulative number of new reports and x is the number of years elapsed since 2000 (the first year of data collection). To facilitate interpretation and visualisation, x was back-transformed to year (by adding 2000). See also Suppl. material 1: fig. S3.